# Update special price promotion

Use the **UpdateSpecialPricePromotion** method to modify promotion at a special price.

## Request parameters

<table><thead><tr><th width="180.933349609375">Parameters</th><th>Type / Description</th></tr></thead><tbody><tr><td><code>promotionCode</code></td><td><p><strong>Required (string)</strong></p><p>Code of the promotion that you want to update.</p></td></tr><tr><td><code>sessionID</code></td><td><p><strong>Required (string)</strong></p><p>Unique identifier of the session.</p></td></tr><tr><td><code>existingPromotion</code></td><td><p><strong>Required (string)</strong></p><p>Details of the existing promotion.</p></td></tr><tr><td><code>PriceMatrix</code></td><td><p><strong>Required (array of objects)</strong></p><p>Only for this type of promotion. It is generated by getPriceMatrix and used to set promotion special prices.</p></td></tr></tbody></table>

### Request sample

```php
<?php
require ('PATH_TO_AUTH');

// Retrieve promotion details

$promotionCode = 'PROMOTION_CODE'; // code of the promotion that you want to update

$jsonRpcRequest = array (
'jsonrpc' => '2.0',
'id' => $i++,
'method' => 'getPromotion',
'params' => array($sessionID, $promotionCode)
);
//var_dump (callRPC((Object)$jsonRpcRequest, $host));

// Keep the promotion you want to update in $existingPromotion
$existingPromotion = callRPC((Object)$jsonRpcRequest, $host);
// Set the fields to update

$priceMatrixDefinition1 = new stdClass;
$priceMatrixDefinition1->ProductCode = "test";
$priceMatrixDefinition1->PricingConfigurationCode = "738C6A2049";
$priceMatrixDefinition1->OptionHash = "708e43960c4edc42f14cf388bcb24bde";

$option1 = new stdClass;
$option1->GroupName = "Units";
$option1->OptionText = "1 - maximum";

$price1 = new stdClass;
$price1->Value = 20;
$price1->Currency = "USD";
$price2 = new stdClass;
$price2->Value = 15;
$price2->Currency = "EUR";

$priceMatrixDefinition1->Options = [$option1];
$priceMatrixDefinition1->Prices = [$price1, $price2];

$existingPromotion->DefaultCurrency = 'USD';
$existingPromotion->PriceMatrix = [\
    $priceMatrixDefinition1\
];

// Update the promotion
$jsonRpcRequest = array (
'jsonrpc' => '2.0',
'id' => $i++,
'method' => 'updatePromotion',
'params' => array($sessionID, $existingPromotion)
);
var_dump (callRPC((Object)$jsonRpcRequest, $host));
```

## Response

```json
{
  "jsonrpc": "2.0",
  "id": 2,
  "result": {
    "Code": "M99QQ7Q97A",
    "Name": "Promo percentage REST",
    "Description": "Promo description1",
    "StartDate": "2019-11-30",
    "EndDate": "2100-12-31",
    "MaximumOrdersNumber": -1,
    "MaximumQuantity": "1",
    "InstantDiscount": false,
    "Coupon": {
      "Type": "MULTIPLE",
      "Codes": [
        "code1",
        "code2"
      ]
    },
    "Enabled": true,
    "Type": "SPECIAL_PRICE",
    "Products": [
      {
        "Code": "test",
        "PricingOptionCodes": null,
        "PricingConfigurationCode": null
      }
    ],
    "Translations": [
      {
        "Name": "Promo percentage REST",
        "Language": "EN"
      }
    ],
    "Sources": [],
    "ApplyRecurring": "NONE",
    "RecurringChargesNumber": "0",
    "DefaultCurrency": "EUR",
    "PriceMatrix": [
      {
        "ProductCode": "test",
        "PricingConfigurationCode": "738C6A2049",
        "OptionHash": "708e43960c4edc42f14cf388bcb24bde",
        "Options": [
          {
            "GroupName": "Units",
            "OptionText": "1 - maximum"
          }
        ],
        "Prices": [
          {
            "Value": 31.15600000000014,
            "Currency": "CAD"
          },
          {
            "Value": 20,
            "Currency": "EUR"
          },
          {
            "Value": 40,
            "Currency": "USD"
          },
          {
            "Value": 1587.5251590697817,
            "Currency": "ARS"
          },
          {
            "Value": 18541.128586270122,
            "Currency": "CLP"
          },
          {
            "Value": 18.132399999999887,
            "Currency": "GBP"
          },
          {
            "Value": 2447.1999999999794,
            "Currency": "JPY"
          },
          {
            "Value": 499.51800000000384,
            "Currency": "MXN"
          },
          {
            "Value": 97.536,
            "Currency": "RON"
          },
          {
            "Value": 1846.0500000000052,
            "Currency": "RUB"
          },
          {
            "Value": 601.8285443739301,
            "Currency": "UAH"
          },
          {
            "Value": 384.3740000000019,
            "Currency": "ZAR"
          }
        ]
      }
    ]
  }
}
```


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